Diacidylpyrocatechin-ortho-carboxylic-acid compound.



i To all whom it may concern rmrrnn s'rArEs EBICH n'mrz, OF

PATENT ;o nnicn.

nmannrnw, GERMANY, Assmnon TO SYNTHETIC ra'rnnr's 00., nm, ornnw vonx, N. Y A'coRronA'rIoN or nnw'vonx.

-DIACIDYLPYROOATEOHIN-ORTHb-QhRBOXYLIG-AGID COMPOUND.

No Drawing.

4 Be it known that I, Enron Rmrz, doctor of philosophy, chemist, citizen of the Ger man Empire residing at Elberfeld, Ger

many, have invented new and useful Imrovements in Diacidylpyrocatechin-Qrtho- -arboxylic=Aeid Compound, of which the following is a specification,

I have found that new and valuable antipyretics can be obtained by replacing in com- 1 pounds having most probably the following pyrocatechinf-ortho-carboxylic acid genenal formula:

. on 1) a 7 Rou 2) cooms I (R standing for an aryl e. g. i 0511K, C H OH the hydrogen atoms of the two OH groups b an acid 1 radical e. g. 50+--,etc.) The" new products are whitish 'crystalline'subr' GH3+CO-, o on stances soluble in'the usual organic solvents is filtered ofl and from alcohol.

4 practically insoluble in water having most j probably .the following general formula:

R standing for an 'aryl; R. for an acidy i radical. In order to parts of acetic acid anhydrid. After cooling the product of the reaction having most probably the formula:

coo -cu.

illustrate-the new process more' fully the following example is given, the

Patented May 25, 1915.

It is a whitish powder melting at from 148-150 O. l i

ortho-carboxylic acid compounds having imostprobably the following formula:

cooma Application-filed ae-6,1914; serialmsemsa I 4 5 tically insoluble in water, substantially as descrlbed.

2, The herein described new antipyretic being chemically iacetyl-pyr0catechin-.

the formula: I

' -o--cocn coon which is a whitish owder of the melting point 148 to 150 soluble in the usual organic solvents, practically insoluble in water, substantially as described. In testimony whereof I have hereunto set my hand in the presence of two subscrlbmg witnesses.

" ERICH 'nrnrzi a 8.1

Witnesses: I HELEN.Nur'rm,

ALBERT Norma, I

ortho-carboxylic aci having most probably 

